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    <title>Document</title>
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<body>
    <script>
        // 编写函数getobj(arr) 统计数字出现的次数
        var arr = ["a", "a", "b", "c", "b"];
        var obj = {};
        var count = 0;
        function getobj(arr) {
            for (var i = 0; i < arr.length; i++) {
                for (var g = 1 + i; g < arr.length; g++) {
                    if (arr[i] == arr[g]) {
                        count++;
                    }
                    obj[arr[i]] = count
                }
            }
            return obj;
        }
        var newobj = getobj(arr);
        console.log(newobj);
    </script>
</body>

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